eGHOST will be the first milestone for the development of eco-design criteria in the European hydrogen sector. Two guidelines for specific FCH products (PEMFC stack and SOE) will be completed and the lessons learnt will be integrated in the eGHOST White Book, a reference guidance book for any future eco-design project of FCH systems. eGHOST aims to support the whole FCH sector. Therefore, it addresses the eco-(re)design of mature products (PEMFC stack) and those emerging with TRLs around 5 (SOE) in such a way that sustainable design criteria can be incorporated since the earliest stages of the product development. eGHOST will go a step beyond the current state of the art of eco-design by incorporating eco-efficiency assessment, i.e. combining environmental and economic decision-making tools, and social life cycle assessment to determine the social impacts of the products. Therefore, eGHOST proposes a sustainable (re)design looking at minimizing the economic, environmental and social impacts of the products along their life cycle. Other innovation will be the use of prospective approach for the life cycle thinking tools used to assess the products performance, i.e. to determine the impacts of all the life cycle stages of the product at the time of its occurence. This is required to get valid information of those products at early stages of development. The European Commission considers eco-design as a key factor to fulfil its commitment to a climate-neutral and circular economy in 2050 as identified in different documents (EU Green Deal, New Industrial Strategy for Europe, Circular Economy Directive…). eGHOST will contribute to positioning FCH in this context by developing the first preparatory study of a hydrogen product under the guiding principles of the Eco-design Directive. As well, eGHOST will improve the understanding of FCH technologies as a sustainable investment under the EU Taxonomy, and will enhance Corporate Social Responsibility studies.